This is one of the brightest globulars visible in the night sky and near the Galactic bulge region in the constellation Sagittarius. It has a few names, M22, Messier 22, and NGC 6656.
It has an apparent magnitude of 5.5, making it an interesting object visually. Through a modest instrument, hundreds of stars can be resolved. M22 is one of only four globulars of our galaxy known to contain a planetary nebula.
I tried something a little different with this object. I captured only Red, Green, and Blue filtered light. I aimed to reveal as much colour as possible in the core. Hopefully, it’s not too over the top
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Exposure Details:
- Red 24X600 Binned 1X1
- Green 23X600 Binned 1X1
- Blue 24X600 Binned 1X1
- Total Exposure: 11.8 Hours
Instruments:
- Telescope: 10" Ritchey-Chrétien RCOS
- Camera: SBIG STL-11000 Mono
- Mount: Astro-Physics AP-900
- Focal Length: 2310.00 mm
- Pixel size: 9.00 um
- Resolution: 0.82 arcsec/pix
Thanks for looking
Image link